\(a.m_O=1.16=16\left(g\right)\\ m_{O_2}=1.32=32\left(g\right)\\ b.m_{Fe}=1,5.56=84\left(g\right)\\ m_{Fe_2O_3}=1,5.160=240\left(g\right)\\ c.m_N=0,25.14=3,5\left(g\right)\\ m_{NO_2}=2,5.46=115\left(g\right)\\ d.m_{C_6H_{12}O_6}=1.180=180\left(g\right)\)
a,mo=16. mo2=32
b,mfe=1,5x56=84. mfe2o3=1,5x(56x2+16x3)=195
c, mn= 0,25x14=3,5. mno2=2,5x(14+16x2)=115